All XAM O-Ring chains are manufactured with hi-carbon alloy steel for strength and durability. XAM utilizes Nitrite Butadiene O-Rings to seal in lubrication and deliver smooth power with minimal ring drag or loss of horsepower.XAM O-Ring chains have X shaped seals and improved metallurgy giving you 7 times longer wearlife than standard O-Ring chains. Viewed in cross-section the X-Ring has two lubrication pools and contact lips versus the single contact design of a standard O-Ring chain. Giving the chain a longer life gives you more value for your money. All XAM O-Ring chains are manufactured with hi-carbon alloy steel for strength and durability. XAM utilizes Nitrite Butadiene O-Rings to seal in lubrication and deliver smooth power with minimal ring drag or loss of horsepower. Chain length is 114 links.